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2006 International Symposium on Discharges and Electrical Insulation in Vacuum最新文献

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Localized and Delocalized Features of Microscopic Work Functions 微观功函数的局域与非局域特征
2006 International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2006-09-01 DOI: 10.1109/DEIV.2006.357418
Masahiro Sasaki, Shigehiko Yamamoto
{"title":"Localized and Delocalized Features of Microscopic Work Functions","authors":"Masahiro Sasaki, Shigehiko Yamamoto","doi":"10.1109/DEIV.2006.357418","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357418","url":null,"abstract":"Recent measurements of the microscopic work function distributions based on the local tunneling barrier height by means of scanning tunneling microscopy have been reviewed. Highly localized and widely delocalized features of the microscopic work function have been observed. As a former case, individual atoms on NiAl(HO) show element-specific local work functions. On the other hand, the effect of work function reduction by Cs adsorption on Pt(111) extends over an area wider than tens of nanometers. These results indicate that the work function distribution can not be explained within the framework of electric dipole moments induced by surface atoms, and that detailed features of wave functions should be taken into account","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130704591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Development of a Plasma Source for a Vacuum Arc Thruster Controlled by a Microcontroller 微控制器控制真空电弧推力器等离子体源的研制
2006 International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2006-09-01 DOI: 10.1109/DEIV.2006.357413
S. Shibata, T. Yanagidaira, K. Tsuruta
{"title":"Development of a Plasma Source for a Vacuum Arc Thruster Controlled by a Microcontroller","authors":"S. Shibata, T. Yanagidaira, K. Tsuruta","doi":"10.1109/DEIV.2006.357413","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357413","url":null,"abstract":"A plasma source for vacuum arc thruster was developed. Electrical energy stored in two resonators is delivered to a vacuum gap and metal ions are emitted from the electrodes. The ions obtain momentum and the thruster obtains thrust power from reaction of ions. A high frequency (HF) current was used to generate energetic ions in spark phase, and a low frequency (LF) current was intended to heat electrodes in the course of repetitive discharge, producing a large amount of ions having low energy from the bulk of electrodes. The duration of the HF and LF current is controlled by a combination of microcontroller, variable reactor (varactor) and fast switching devices","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122265272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Comparison of Axial Magnetic Field Characteristics of Four Axial Magnetic Field Vacuum Interrupter Contacts 四种轴向磁场真空灭流器触点轴向磁场特性比较
2006 International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2006-09-01 DOI: 10.1109/DEIV.2006.357303
Zhongyi Wang, Zhiyuan Liu, Xuan Zhang, Yuesheng Zheng, Jimei Wang
{"title":"Comparison of Axial Magnetic Field Characteristics of Four Axial Magnetic Field Vacuum Interrupter Contacts","authors":"Zhongyi Wang, Zhiyuan Liu, Xuan Zhang, Yuesheng Zheng, Jimei Wang","doi":"10.1109/DEIV.2006.357303","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357303","url":null,"abstract":"Magnetic characteristics of axial magnetic field (AMF) of four kinds of vacuum interrupter contacts are studied with 3D finite element method, which included axial magnetic flux density, eddy current in contact plates and phase shift time between AMF and source current. Four AMF vacuum interrupter contacts are studied, which include coil type, cup type, bipolar type and quadrapolar type. The results show that: 1) The strongest AMF at current peak is with coil type contact. It follows by bipolar type, cup type, quadrapolar type with which AMF weakens accordingly. 2) The weakest AMF at current zero is with quadrapolar type contact. It follows by bipolar type, cup type, coil type with which AMF strengthens accordingly. 3) The shortest phase shift time is with bipolar type. It follows by quadrapolar type, coil type, cup type with which phase shift time becomes higher accordingly","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129448648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Analysis of Axial Magnetic Field Characteristics of Coil Type Axial Magnetic Field Vacuum Interrupters 线圈式轴向磁场真空灭弧器轴向磁场特性分析
2006 International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2006-09-01 DOI: 10.1109/DEIV.2006.357302
Zhongyi Wang, Zhiyuan Liu, Xuan Zhang, Yuesheng Zheng, Jimei Wang
{"title":"Analysis of Axial Magnetic Field Characteristics of Coil Type Axial Magnetic Field Vacuum Interrupters","authors":"Zhongyi Wang, Zhiyuan Liu, Xuan Zhang, Yuesheng Zheng, Jimei Wang","doi":"10.1109/DEIV.2006.357302","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357302","url":null,"abstract":"Axial magnetic field (AMF) characteristics of coil type AMF vacuum interrupters are analyzed by 3D finite element method. Seven contact parameters are taken into account in this paper. Analysis results show that: (1) Axial magnetic flux density decreases with increase of contact diameter, coil height, and gap distance. Axial magnetic flux density is not sensitive to coil thickness. So is contact plate material. Axial magnetic flux density is strongly influenced by welding of stainless steel plates to contact plate and coil. (2) Phase shift time between AMF and source current decreases with decrease of contact diameter and increase of contact gap. And it also decreases when contact material is CuCr50. (3) Maximum current density in coils or contact plates decreases with increase of contact diameter, coil thickness. And it also decreases when contact material is CuCr25. So does conductor resistance","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134390350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Vacuum Interrupter Design for HV and VHV Applications 高压和甚高压应用的真空灭流器设计
2006 International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2006-09-01 DOI: 10.1109/DEIV.2006.357268
L. Falkingham
{"title":"Vacuum Interrupter Design for HV and VHV Applications","authors":"L. Falkingham","doi":"10.1109/DEIV.2006.357268","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357268","url":null,"abstract":"Presently there is an upsurge in interest in the use of vacuum interruption at transmission voltages (< 100kV). This is due mainly to environmental concerns over the use of SF6 gas, which is today the dominant technology for switching applications at these high voltages. Vacuum interruption has dominated the medium voltage range of switchgear (< 52kV) for many years, and it would appear logical to try to apply vacuum interruption technology to these higher voltage ranges. However applying existing vacuum interrupter technology to higher voltages is not straightforward and there are a number of technical and economic factors to be taken into account. There is some history of applying vacuum interruption to these high voltages and a second paper at this conference (ibid.) deals with this experience and the reasons why this technology was not universally adopted at the time","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131496734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
126 kV Vacuum Circuit Breaker Debuted in China 126千伏真空断路器在中国首次亮相
2006 International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2006-09-01 DOI: 10.1109/DEIV.2006.357213
Jimei Wang
{"title":"126 kV Vacuum Circuit Breaker Debuted in China","authors":"Jimei Wang","doi":"10.1109/DEIV.2006.357213","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357213","url":null,"abstract":"A single break 126 kV vacuum circuit breaker debuted in China is introduced. Configuration of 126 kV vacuum circuit breaker and configuration of its electrode are illustrated. Particularly, silicone oil is used as external insulation of vacuum interrupters. Heat radiators are designed for raising rated current. Permanent magnet actuators with long stroke are developed for improving performance of the vacuum circuit breaker","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132195556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
The Influence of Mechanical Properties of Contact Materials on the Contact Performance 接触材料力学性能对接触性能的影响
2006 International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2006-09-01 DOI: 10.1109/DEIV.2006.357351
B. Miao, Yan Zhang, Guoxun Liu, Wenbin Wang, Gang Li, Yi Shan, X. Pu
{"title":"The Influence of Mechanical Properties of Contact Materials on the Contact Performance","authors":"B. Miao, Yan Zhang, Guoxun Liu, Wenbin Wang, Gang Li, Yi Shan, X. Pu","doi":"10.1109/DEIV.2006.357351","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357351","url":null,"abstract":"Mechanical properties of two sorts of CuCr(75/25) contact materials adopted widely for vacuum interrupters were determined by standard tensile test and impact test, and fracture characteristics of these two materials after tests were analyzed by optical and SEM equipped with EDS. It was shown that the tensile strength, ductility and impact strength of Cu-25Cr alloy contact material by vacuum casting are superior to that of CuCr25 p/m contact material by sintering technique; Fractographs of these contact materials revealed distinct fracture mechanisms, i.e. dimply ductile fracture of Cu-25Cr alloy materials, in contrast with primarily cleavage fracture of Cr-particles and interfacial fracture between Cr and Cu-matrix in CuCr25 p/m materials. The influence of strength, ductility and interfacial bonding strength between Cr/Cu phases on the contact performance of contact materials were discussed","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127040613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Investigation of a plasma flow of a short vacuum spark 短真空火花等离子体流动的研究
2006 International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2006-09-01 DOI: 10.1109/DEIV.2006.357227
I. Muzukin
{"title":"Investigation of a plasma flow of a short vacuum spark","authors":"I. Muzukin","doi":"10.1109/DEIV.2006.357227","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357227","url":null,"abstract":"The vacuum spark was explored. The pulse of a voltage was put to a vacuum gap by duration 4 ns and amplitude 150kV. At the analysis of plasma flow ions of a material emanating from cathode area with energies up to 150keV are found out. Copper and graphite cathodes were used. In case of the graphite cathode the one-charging ions of carbon with energy bell-shaped distribution were observed only. In case of the copper cathode charging numbers up to 3 are fixed, energy distribution has some maximums. The most probable energies of ions depend on distance the anode-cathode","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130233915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Ion Erosion Rate in a High Current Vacuum Spark 大电流真空火花中的离子侵蚀速率
2006 International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2006-09-01 DOI: 10.1109/DEIV.2006.357317
S. Gorbunov, V. Krasov, V. Paperny, Y. Korobkin, I. Romanov
{"title":"Ion Erosion Rate in a High Current Vacuum Spark","authors":"S. Gorbunov, V. Krasov, V. Paperny, Y. Korobkin, I. Romanov","doi":"10.1109/DEIV.2006.357317","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357317","url":null,"abstract":"Measurements of the ion erosion rate for copper cathode in the low-inductance vacuum spark are presented. The spark peak current was varied from 3 kA up to 13 kA therewith the current rise rate increases from 4middot109 up to 1.5middot1010 A/s. The mean velocity of the cathode plasma flame was obtained by means of the passive collector time-of-flight measurements. It was shown that the velocity increases from 2middot104 m/s up to 8middot10 4 m/s with the discharge enhancement. Mechanical momentum of the plasma flame was measured with a ballistic pendulum, located beyond annual anode in the immediate vicinity. From these data the ion erosion rate was derived at range of peaks of the discharge current mentioned above. This parameter holds to within the accuracy of measurements throughout the range of the current variations. Its value is of 7middot10-5 g/Q and is close to the well-known one that has been obtained earlier in low-current vacuum arcs","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130290708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dependence of sustained arc formation on charging environment of satellite solar array 卫星太阳能电池阵充电环境对持续电弧形成的影响
2006 International Symposium on Discharges and Electrical Insulation in Vacuum Pub Date : 2006-09-01 DOI: 10.1109/DEIV.2006.357408
T. Kitamura, Y. Sanmaru, T. Kawasaki, S. Hosoda, K. Toyoda, M. Cho
{"title":"Dependence of sustained arc formation on charging environment of satellite solar array","authors":"T. Kitamura, Y. Sanmaru, T. Kawasaki, S. Hosoda, K. Toyoda, M. Cho","doi":"10.1109/DEIV.2006.357408","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357408","url":null,"abstract":"Recently, an arcing on satellite solar array due to interaction between space plasma and the array threatening safety of spacecraft is a big issue. The arcing causes degradation of solar array at malfunction of instruments on satellites. The discharge is caused by differential potential between satellite body and insulator surfaces like coverglass of solar array, which are charged by ambient plasma. This single shot discharge is called \"primary arc\". The primary arc can evolve to so-called \"sustained arc\" that permanently short-circuits adjacent solar cells or a solar cell and conductive substrate. In order to prevent arcs on the surface of solar array, it is necessary to carry out arc tests simulating discharge phenomenon on solar array. In this paper, we investigated the effect of plasma environments on sustained arcs. GaAs solar cells were used for the test. Laboratory tests were carried out with an external circuit simulating a spacecraft power system. Solar array coupon panels simulating the hot and return ends of a string circuit were tested under various combinations of string voltage and string current. We revealed that the threshold conditions for sustained arc formation were different in test plasma environment even when the string voltage and the string current are same","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130386635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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